Phase equilibria of high molecular mass 1-alcohols in supercritical propane

被引：16

作者：

Schwarz, C. E. ^{[1
]}

Knoetze, J. H. ^{[1
]}

机构：

[1] Univ Stellenbosch, Dept Proc Engn, ZA-7602 Matieland, South Africa

来源：

FLUID PHASE EQUILIBRIA | 2007年 / 258卷 / 01期

关键词：

1-alcohols; propane; supercritical; phase equilibrium;

D O I：

10.1016/j.fluid.2007.04.027

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The phase equilibria of high molecular mass 1-alcohols in supercritical propane is measured to investigate the relationship between the phase equilibrium pressure and the number of carbon atoms and by comparison with n-alkanes, to show the effect of the hydroxyl group. Binary phase equilibrium measurements of high molecular mass 1-alcohols (with 10, 12, 16, 18 and 22 carbon atoms) in supercfitical propane are measured between 378 and 408 K for 1-alcohol mass fractions of 0.0175-0.600. Complete solubility below 100 bar, with no region of liquid-liquid immiscibility, is observed and the phase transition pressure increases with increasing number of carbon atoms. By plotting the number of carbon atoms as a function of the phase transition pressure at constant temperature and mass fraction 1-alcohol, a linear relationship is realized. This linear relationship can be used to estimate the phase equilibrium of 1-alcohols with 10-22 carbon atoms in propane. When the measured 1-alcohol-propane data is compared to published n-alkane-propane data it can be seen that the hydroxyl group has the effect of increasing the phase equilibrium pressure of the 1-alcohol in comparison to the n-alkane. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：51 / 57

页数：7

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